A month after it was raised during a session of the Search Engine Strategies show, and even longer since it was raised on various search forums, a bug allowing people to hijack listings at Google continues. Pandia has a nice summary: Spammers hijack web site listings in Google. Discussion in our forums here: MIA in Google? Google bug allows 3rd party hijacking.
Meanwhile, another long-standing problem with redirections, this time on Yahoo's side, also continues. More in our forums: Yahoo 301 Redirect indexing problem
I'm planning a longer look at both issues, for the near future.